JP3365997B2 - Primary / secondary pump type heat source variable flow system - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a primary / secondary pump type heat source variable flow system for variably controlling a heat medium flow rate according to a change in an air-conditioning load state of a building to perform heat source control economically and highly energy-saving. Regarding

[0002]

2. Description of the Related Art In a conventional primary / secondary pump type heat source variable flow system, cold water or hot water produced by a cold / hot water generator is pumped by a cold / hot water primary pump to an outgoing primary header and then cooled / hot secondary water. It is pressure-fed to the air conditioner by the pump through the outgoing secondary header and the water pipe. The cold water or hot water sent to the air conditioner exchanges heat with the carrier air in the air conditioner, and is then returned to the cold / hot water generator via the return header and the return water pipe. The air conditioning load transported to the cold / hot water generator in this manner is discharged to the outside through the cooling water pump of the cooling water circuit and the cooling tower during cooling. At this time, if the flow rate of cold water or hot water conveyed by the cold / hot water primary pump and the flow rate of cold water or hot water conveyed by the cold / hot water secondary pump are balanced, the flow rate of the bypass pipe connecting the forward primary header and the return water pipe will be It becomes 0. If the former is larger than the latter, a flow is formed in the bypass pipe from the outgoing primary header to the return water pipe, and conversely, if the latter is larger than the former, the bypass pipe is from the return water pipe to the outgoing primary header. Is formed. From the viewpoint of energy saving, it is desirable to operate so that the bypass pipe flow rate is 0. Therefore, the heat source control device constantly measures the bypass pipe flow rate, and the control output of the cold / hot water primary pump is calculated and output so that this value becomes 0. To do. In addition to controlling the cold / hot water primary pump, the heat source control device calculates the control output of the cold / hot water secondary pump according to the load condition such as the water supply pressure, and changes the flow rate of the cold / hot water primary pump and the cold / hot water secondary pump. The control may be performed in parallel.

[0003]

Without lowering the thermal comfort of the indoor environment and the COP (coefficient of operation) of the heat source device,
In order to perform heat source control that is economical and has a high energy saving effect, it is an important requirement not only to appropriately control the heat medium flow rate, but also to maintain the heat medium feed water temperature and return water temperature under prescribed conditions. . However, in the conventional primary / secondary pump type heat source variable flow rate system, since the operation is performed so that the bypass pipe flow rate becomes zero with an emphasis on energy saving, the control operation at the start-up or the feed water temperature satisfies the conditions. Recovery control operation when there is no (when the cold water supply temperature is too high or when the hot water supply temperature is too low) or when the return water temperature does not meet the conditions (when the cold water return water temperature is too low or the hot water return water temperature is too high) There was a problem that there was a delay. As a method of solving this, there is a method of controlling the number of units, that is, a method of quickly increasing or decreasing the number of operating heat source units to control them to a predetermined temperature condition. Although it is possible to satisfy the temperature condition of 1), there is a risk that the flow rate condition of the heat medium falls into an excessive flow rate or an excessive flow rate, which rather impairs controllability and energy saving.

The present invention has been made in view of the above circumstances. The heat medium flow rate is variably controlled according to the change in the air conditioning load state of the building, and the heat source control that is economical and has a high energy saving effect is performed, and the heat medium temperature is also controlled. It is an object of the present invention to provide a primary / secondary pump type heat source variable flow system that performs heat source control with excellent responsiveness to disturbance of conditions.

[0005]

In order to achieve the above object, the present invention is a primary / secondary pump type heat source variable flow system for air-conditioning a building by circulating cold and hot water from a heat source side and a load side. A load side device and a load side cold / hot water transport device for processing an air conditioning load, a heat source side device and a heat source side cold / hot water transport device for supplying cold / hot water to the load side device and the load side cold / hot water transport device, and the heat source. A cooling tower and a cooling water transfer device for supplying cooling water to the side device, and a bypass pipe connecting the cold / hot water sending side pipe line and the cold / hot water return water side pipe line,
A variable flow rate control device for circulating and supplying cold / hot water and cooling water according to an air conditioning load by variably controlling the heat source side cold / hot water transport device so that the flow rate of the bypass pipe becomes a predetermined value. To do.

Further, the present invention is a primary / secondary pump type heat source variable flow system which circulates cold / hot water from the heat source side and the load side to air-condition a building, and a load side device and load for processing an air conditioning load. Side cold / hot water transfer device, heat source side device and heat source side cold / hot water transfer device for supplying cold / hot water to the load side device and load side cold / hot water transfer device, and cooling tower and cooling for supplying cooling water to the heat source side device A variable flow rate control device that performs variable control so that the water transport device, the bypass pipe connecting the cold / hot water water supply side pipe and the cold / hot water return water side pipe, and the cold / hot water and the cooling water are circulated and supplied according to the air conditioning load. And, the variable flow rate control device calculates and outputs the control output of the heat source side cold / hot water transport device so that the bypass pipe flow rate becomes a predetermined value when the load side cold / hot water feed temperature is within the set range. Load side cold / hot water Water temperature is characterized in that for calculating outputting a control output of the heat source side hot and cold water conveying device so as to increase the heat-source side hot and cold water conveyance amount when outside the above setting range.

Further, the present invention is a primary / secondary pump type heat source variable flow system for circulating and supplying cold / hot water from a heat source side and a load side, the load side device and load for processing an air conditioning load. Side cold / hot water transfer device, heat source side device and heat source side cold / hot water transfer device for supplying cold / hot water to the load side device and load side cold / hot water transfer device, and cooling tower and cooling for supplying cooling water to the heat source side device A variable flow rate control device that performs variable control so that the water transport device, the bypass pipe connecting the cold / hot water water supply side pipe and the cold / hot water return water side pipe, and the cold / hot water and the cooling water are circulated and supplied according to the air conditioning load. And the variable flow rate control device calculates and outputs the control output of the heat source side cold / hot water transport device so that the bypass pipe flow rate becomes a predetermined value when the load side cold / hot water return water temperature is within the set range. , Load side cold / hot water Water temperature is characterized in that for calculating outputting a control output of the heat source side hot and cold water conveying device so as to reduce the heat-source side hot and cold water conveyance amount when outside the above setting range.

Further, according to the present invention, in the primary / secondary pump type heat source variable flow system, the control output of the cooling water transfer device is calculated based on the control output of the heat source side cold / hot water transfer device. It is what

Further, the present invention is a primary / secondary pump type heat source variable flow system for circulating and supplying cold and hot water from a heat source side and a load side to air-condition a building. Side cold / hot water conveying device, heat source side device and heat source side cold / hot water conveying device for supplying cold / hot water to the load side device and load side cold / hot water conveying device, and heat storage tank and heat source for supplying heat source water to the heat source side device By variably controlling the water transport device, the bypass pipe connecting the cold / hot water sending side pipe line and the cold / hot water return side pipe line, and the heat source side cold / hot water transport device so that the flow rate of the bypass pipe becomes a predetermined value. And a variable flow rate control device for circulatingly supplying cold / hot water and heat source water according to an air conditioning load.

Further, the present invention is a primary / secondary pump type heat source variable flow system for circulating and supplying cold / hot water from a heat source side and a load side, and a load side device and a load for treating an air conditioning load. Side cold / hot water conveying device, heat source side device and heat source side cold / hot water conveying device for supplying cold / hot water to the load side device and load side cold / hot water conveying device, and heat storage tank and heat source for supplying heat source water to the heat source side device A variable flow rate control device that variably controls so as to circulate and supply cold / hot water and heat source water according to the air conditioning load, and a bypass pipe that connects the hot / cold water sending side pipeline and the cold / hot water return side pipeline And the variable flow rate control device calculates and outputs the control output of the heat source side cold / hot water transport device so that the bypass pipe flow rate becomes a predetermined value when the load side cold / hot water return water temperature is within the set range. , Load side cold / hot water Water temperature is characterized in that for calculating outputting a control output of the heat source side hot and cold water conveying device so as to reduce the heat-source side hot and cold water conveyance amount when outside the above setting range.

Further, according to the present invention, in the primary / secondary pump type heat source variable flow rate system, the control output of the heat source water transfer device is calculated based on the control output of the heat source side cold / hot water transfer device. It is what

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a structural explanatory view showing a primary / secondary pump type heat source variable flow system according to an embodiment of the present invention.

In FIG. 1, 11 is a cold / hot water generator, and 12
Is a cold / hot water primary pump, 13 is a cooling tower, 14 is a cooling water pump, 15 is an air conditioner, and 16 is a cold / hot water secondary pump. A plurality of cold / hot water generators 11 are provided in parallel, and each of them has a cold / hot water primary pump 12, a cooling tower 13, and a cooling water pump 1.
4 are provided correspondingly. Reference numerals 17 and 18 denote an outgoing primary header and an outgoing secondary header that mix cold water or hot water from the cold / hot water generator 11, respectively, and 19 is a return header that mixes cold water or hot water that returns to the cold / hot water generator 11. The bypass pipe 20 is provided so as to connect the outgoing primary header 17 and the return water pipe 21, or the outgoing primary header 17 and the return header 19. The bypass pipe 20 is used as a boundary to divide the piping system into a heat source side on which heat source equipment such as the cold / hot water generator 11 is arranged and a load side on which load equipment such as the air conditioner 15 is arranged. Reference numeral 22 denotes a pump variable flow controller (INV), which is provided corresponding to the cold / hot water primary pump 12 and the cooling water pump 14. Reference numeral 23 is a water supply temperature sensor for measuring the water supply temperature to the air conditioner 15, 24 is a flow meter for measuring the bypass pipe flow rate, and 25 is a water supply pipe.

The normal control operation of the primary / secondary pump type heat source variable flow system is as follows. That is, the cold water or hot water produced by the cold / hot water generator 11 is pressure-fed to the outgoing primary header 17 by the cold / hot water primary pump 12,
It is pressure-fed to the air conditioner 15 by the cold / hot water secondary pump 12 via the outgoing secondary header 18 and the water supply pipe 25. Air conditioner 1
The cold water or hot water sent to 5 exchanges heat with the carrier air in the air conditioner 15, and then is returned to the cold / hot water generator 11 via the return header 19 and the return water pipe 21. The air conditioning load thus conveyed to the hot / cold water generator 11 is discharged to the outside through the cooling water pump 14 and the cooling tower 13 of the cooling water circuit during cooling. At this time, when the flow rate of the cold water or hot water conveyed by the cold / hot water primary pump 12 and the flow rate of the cold water or hot water conveyed by the cold / hot water secondary pump 16 are balanced, the flow rate of the bypass pipe 20 becomes zero. When the former is larger than the latter, a flow is formed in the bypass pipe from the incoming primary header 17 to the return water pipe 21, and when the latter is larger than the former, the bypass pipe 20 is fed from the return water pipe 21 to the primary pipe. A flow is formed towards the header 17.

Reference numeral 26 is a heat source control device for optimally controlling the cold / hot water primary pump 12 and the cooling water pump 14 in accordance with changes in the load condition of the air conditioner 15. The heat source control device 26 includes
A state input unit 27 that monitors the current operating state and load state and captures them as data, and a variable flow rate control calculation unit 28 that calculates control signals for the cold / hot water primary pump 12 and the cooling water pump 14.
And a feed water temperature compensation control calculation unit 29 that calculates control signals for the cold / hot water primary pump 12 and the cooling water pump 14 when the load-side feed water temperature deviates from the set range, and the cold / hot water primary pump 1
2 and a control output unit 30 that outputs a control signal to the cooling water pump 14 is mounted.

The variable flow rate control of the primary / secondary pump type heat source variable flow rate system is carried out as shown in the flow chart of FIG. That is, the state input unit 27 of the heat source control device 26
In the above, a signal relating to the operating state of each device and a load state such as temperature and flow rate is periodically input / data-converted and stored at a predetermined address in the memory. Next, in the variable flow rate control calculation unit 28, when it is determined that the water temperature compensation control is unnecessary (no) based on the acquired operating state and load state,
The optimum control output of the cold / hot water primary pump 12 is calculated by PID control with the bypass pipe flow rate set value as the target value. The bypass pipe flow rate set value is substantially 0, and is preferably set so that a slight flow from the forward header 17 to the return header 19 occurs in consideration of the stability of the water supply temperature. Here, the control output of the cooling water pump 14 can be easily calculated by predefining it as a linear expression relating to the control output of the cold / hot water primary pump 12 with reference to design data. On the other hand, when it is determined that the water temperature compensation control is necessary (yes) based on the acquired operation state and load state, the water temperature compensation control operation unit 29 performs the recovery control operation as described later with reference to FIGS. 3 and 4. The feed water temperature compensation control outputs of the cold / hot water primary pump 12 and the cooling water pump 14 required for the above are calculated. The latest control output calculated by the variable flow rate control calculation unit 28 or the water temperature compensation control calculation unit 29 is output to the control output unit 30, and an appropriate pump control signal for the cold / hot water primary pump 12 and the cooling water pump 14 is output to each device. Is output to.

The feed water temperature compensation control of the primary / secondary pump type heat source variable flow rate system is carried out as shown in FIG. That is, in the case of water temperature compensation control for cold water, when the acquired water temperature exceeds the compensation start temperature (T _CS.MAX ), the compensating operation starts and the cold / hot water primary pump (cold water pump)
Twelve control outputs gradually increase from the current output to the maximum control output. Here, the maximum control output is usually 100% (M
AX%). At this time, the PID control with the bypass pipe flow rate set value as the target value is not performed. After that, when the water supply temperature drops due to the effect of compensation control and falls below the compensation end temperature, the compensating operation ends, and the control output of the cold / hot water primary pump (chilled water pump) 12 is optimized from the maximum control output according to the current load state. It gradually decreases toward a stable output. Conversely, if the supply water temperature compensation control that target hot water, the obtained water temperature is started with compensation operation below the compensation start temperature (T _{HS.M IN),} hot and cold water primary pump (hot water pump) 12 Control of The output gradually increases from the current output toward the maximum control output (MAX%). After that, when the water temperature rises above the compensation end temperature due to the effect of the compensation control, the compensation operation ends, and the control output of the cold / hot water primary pump (hot water pump) 12 changes from the maximum control output (MAX%) to the current load state. Gradually decreases toward the optimum output according to. In order to prevent the water supply temperature from being disturbed at the end of the compensation operation and to start the compensation operation again (hunting), it is desirable to set the compensation operation termination condition severely, as described later.

FIG. 4 is a flow chart showing the water temperature compensation control for cold water.

That is, in step S1, it is checked whether or not the current water temperature compensation control flag is on (ON). If the flag is on, that is, the current state is water temperature compensation control (yes), In step S2, T _S
≦ T _CE and Q _B ≦ Q _BS (where T _S is the load side water temperature, T _CE is the compensation end temperature, Q _B is the bypass pipe flow rate,
If Q _BS is the bypass pipe flow rate setting value (yes),
In step S3, the water temperature compensation control flag is turned off (OF
Then, the operation of the water temperature compensation control calculation unit 29 is stopped. In step S2, T _S ≦ T _CE and Q _B ≦ Q
If it is not _BS (no), in step S4, the pump control output to the cold / hot water primary pump 12 is set to PI so that the load side water supply temperature T _S becomes the load side water supply temperature set value T _{SS of the} target value.
D control. In step S1, if the current water temperature compensation control flag is not ON (NO) (no), the necessity of water temperature compensation control is checked in the subsequent process. In this case, if T _S ≧ T _CS (T _CS is the compensation start temperature) in step S5 (yes), the water temperature compensation control flag is turned on (ON) in step S6 to start the water temperature compensation control. In step S4, the pump control output to the cold / hot water primary pump 12 is PID-controlled so that the load water supply temperature T _S becomes the target value load side water supply temperature set value T _SS .
In step S5, if T _S ≧ T _CS (T _CS is the compensation start temperature) (no), the process ends without entering the water temperature compensation control operation.

In place of the water temperature sensor 23 and the water temperature compensation control arithmetic unit 29 of the primary / secondary pump type heat source variable flow system of the present invention, a return water temperature sensor 31 is used.
And a return water temperature compensation control calculation unit 32 so as to execute the recovery control operation when the load side return water temperature deviates from the set range (when the cold water return water temperature is too low or the hot water return water temperature is too high). You can FIG. 5 and FIG. 6 showing the configuration explanatory view and the return water temperature compensation control operation showing the primary / secondary pump type heat source variable flow system according to this embodiment, respectively.
Shown in.

In FIG. 5, 11 is a cold / hot water generator, and 12 is
Is a cold / hot water primary pump, 13 is a cooling tower, 14 is a cooling water pump, 33 is a heat storage tank, 34 is a heat exchanger, 35 is a heat radiating pump, 15 is an air conditioner, and 16 is a cold / hot water secondary pump. Of these, the cold / hot water generator 11 and the heat storage tank 33 function as a heat source device, and the cold / hot water generator 11 has a cold / hot water primary pump 1
2, a cooling tower 13 and a cooling water pump 14 are provided, and the heat storage tank 33 is provided with a radiation pump 35 and a heat exchanger 34, respectively. Reference numerals 17 and 18 are an outgoing primary header and an outgoing secondary header for mixing cold water or hot water from the heat source machine, and 19 is a return header for mixing cold water or hot water returning to the heat source machine. The bypass pipe 20 is provided so as to connect the outgoing primary header 17 and the return water pipe 21, or the outgoing primary header 17 and the return header 19. The bypass pipe 20 is used as a boundary to divide the piping system into a heat source side on which heat source equipment such as the cold / hot water generator 11 is arranged and a load side on which load equipment such as the air conditioner 15 is arranged. Reference numeral 22 is a pump variable flow controller (INV), which is a cold / hot water primary pump 1
2, provided corresponding to the cooling water pump 14 and the heat radiation pump 35. Reference numeral 31 is a return water temperature sensor for measuring the return water temperature from the air conditioner 15, and 24 is a flow meter for measuring the bypass pipe flow rate. Further, reference numeral 26 is a heat source control device for optimally controlling the cold / hot water primary pump 12, the cooling water pump 14, and the heat radiation pump 35 in accordance with changes in the load state of the air conditioner 15. The heat source control device 26 monitors the current operating condition and load condition and fetches them as data, and a variable flow rate control calculation for calculating control signals for the cold / hot water primary pump 12, the cooling water pump 14 and the heat radiation pump 35. Section 28, a return water temperature compensation control calculation section 32 for calculating control signals for the cold / hot water primary pump 12, the cooling water pump 14 and the heat radiation pump 35 when the load side return water temperature deviates from the set range, and the cold / hot water primary Pump 1
2, a control output unit 30 that outputs a control signal to the cooling water pump 14 and the heat radiation pump 35 is mounted.

Return water temperature compensation control of the primary / secondary pump type heat source variable flow system is carried out as shown in FIG. That is, in the case of the return water temperature compensation control for cold water, the compensation operation starts when the acquired return water temperature falls below the compensation start temperature (T _CR.MIN ), and the cold / hot water primary pump (chill water pump)
12 control outputs are from the current output to the minimum control output (MIN
%) Gradually decreases toward. Here, the minimum control output (M
IN%) is normally 50% to 6% of the rated value in order to prevent abnormal stoppage of the cold / hot water generator 11 due to insufficient shortage of the cold / hot water flow rate.
It is set to 0% output. At this time, the PID control with the bypass pipe flow rate set value as the target value is not performed. After that, when the return water temperature rises due to the effect of the compensation control and exceeds the compensation end temperature, the compensating operation ends, and the control output of the cold / hot water primary pump (chill water pump) 12 changes from the minimum control output to the current load state. Gradually increase towards optimum output. On the contrary, in the case of the return water temperature compensation control for hot water, when the acquired return water temperature exceeds the compensation start temperature ( _THR.MAX ), the compensating operation starts, and the cold / hot water primary pump (hot water pump) 12 The control output gradually decreases from the current output toward the minimum control output (MIN%). After that, when the return water temperature rises and falls below the compensation end temperature due to the effect of the compensation control, the compensation operation ends, and the control output of the cold / hot water primary pump (hot water pump) 12 changes from the minimum control output to the current load state. Gradually increase towards optimum output. The control outputs of the cooling water pump 14 and the heat radiation pump 35 can be easily calculated by referring to the design data and defining them in advance as a linear expression relating to the control output of the cold / hot water primary pump 12. Further, in order to prevent the return water temperature from being disturbed at the end of the compensation operation and to start the compensation operation again (hunting), it is desirable to set the compensation operation termination condition strictly like the processing shown in FIG.

[0024]

As described above, according to the present invention, the heat medium flow rate is variably controlled according to the change in the air conditioning load state of the building,
Primary / secondary pump system that not only performs heat source control that is economical and has a high energy saving effect, but also performs heat source control that has excellent responsiveness to disturbance of the heat medium temperature condition, and that satisfies both the temperature condition and the flow condition of the heat medium. A heat source variable flow system can be provided.

[Brief description of drawings]

FIG. 1 is a structural explanatory view showing a primary / secondary pump type heat source variable flow system according to an embodiment of the present invention.

FIG. 2 is a flowchart illustrating a variable flow rate control operation of the primary / secondary pump type heat source variable flow rate system of FIG.

FIG. 3 is a diagram for explaining a feed water temperature compensation control operation of the primary / secondary pump type heat source variable flow system of FIG. 1.

FIG. 4 is a flow chart for explaining a feed water temperature compensation control operation of the primary / secondary pump type heat source variable flow system of FIG.

FIG. 5 is a structural explanatory view showing a primary / secondary pump type heat source variable flow system according to another embodiment of the present invention.

FIG. 6 is a diagram illustrating a return water temperature compensation control operation of the primary / secondary pump type heat source variable flow system of FIG. 5.

[Explanation of symbols]

11 Cold / hot water generator 12 Cold / hot water primary pump 13 Cooling tower 14 Cooling water pump 15 air conditioner 16 Cooling water secondary pump 17 Forward primary header 18 Outgoing secondary header 19 Return header 20 Bypass pipe 21 Return pipe 22 Pump variable flow controller (INV) 23 Water temperature sensor 24 flow meter 25 water pipe

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shoichi Nakai, 390 Kita Nagai, Miyoshi-cho, Iruma-gun, Saitama Prefecture Within Daidan Co., Ltd. (56) Reference JP-A-4-327738 (JP, A) JP-A-2001-241735 (JP, A) JP-A-8-14630 (JP, A) JP-A-55-118548 (JP, A) JP-A-10-61996 (JP, A) Actual development Sho-60-79639 (JP, U) (JP, A) 58) Fields surveyed (Int.Cl. ⁷ , DB name) F24F 11/02 102

Claims (7)

(57) [Claims] 1. A primary / secondary pump type heat source variable flow system for circulating and supplying cold / hot water from a heat source side and a load side, the load side device and load side cold / hot water for processing an air conditioning load. Conveying device, heat source side device for supplying cold / hot water to the load side device and load side cold / hot water conveying device, and heat source side cold / hot water conveying device, and cooling tower and cooling water conveying device for supplying cooling water to the heat source side device By variably controlling the heat source side cold / hot water transfer device so that the flow rate of the bypass pipe and the bypass pipe connecting the cold / hot water sending side pipe line and the cold / hot water return side pipe line become a predetermined value, And a variable flow rate control device that circulates and supplies cooling water according to an air conditioning load, and a primary / secondary pump type heat source variable flow rate system. 2. A primary / secondary pump type heat source variable flow system for circulating and supplying cold / hot water from a heat source side and a load side, the load side device and load side cold / hot water for processing an air conditioning load. Conveying device, heat source side device for supplying cold / hot water to the load side device and load side cold / hot water conveying device, and heat source side cold / hot water conveying device, and cooling tower and cooling water conveying device for supplying cooling water to the heat source side device And a bypass pipe connecting the hot and cold water supply side pipeline and the cold and hot water return water side pipeline, and a variable flow rate control device for performing variable control so that the cold and hot water and the cooling water are circulated and supplied according to the air conditioning load. The variable flow rate control device calculates and outputs the control output of the heat source side hot / cold water transfer device so that the bypass pipe flow rate becomes a predetermined value when the load side cold / hot water supply temperature is within the set range, and the load side cold temperature is controlled. Water supply temperature is the above A primary / secondary pump type heat source variable flow system characterized by calculating and outputting a control output of a heat source-side cold / hot water transporting device so as to increase the heat source-side cold / hot water transporting amount when it deviates from a set range. 3. A primary / secondary pump type heat source variable flow system for circulating and supplying cold / hot water from a heat source side and a load side, the load side device and load side cold / hot water for processing an air conditioning load. Conveying device, heat source side device for supplying cold / hot water to the load side device and load side cold / hot water conveying device, and heat source side cold / hot water conveying device, and cooling tower and cooling water conveying device for supplying cooling water to the heat source side device And a bypass pipe connecting the hot and cold water supply side pipeline and the cold and hot water return water side pipeline, and a variable flow rate control device for performing variable control so that the cold and hot water and the cooling water are circulated and supplied according to the air conditioning load. The variable flow rate control device calculates and outputs the control output of the heat source side cold / hot water carrier so that the bypass pipe flow rate becomes a predetermined value when the load side cold / hot water return water temperature is within the set range, and the load side Cold water return water temperature is the above A primary / secondary pump type heat source variable flow system characterized by calculating and outputting a control output of a heat source-side cold / hot water transporting device so as to reduce the heat source-side cold / hot water transporting amount when it deviates from a set range. 4. The primary output according to claim 1, 2 or 3, wherein the control output of the cooling water transfer device is calculated based on the control output of the heat source side cold / hot water transfer device.
Secondary pump type heat source variable flow system. 5. A primary / secondary pump type heat source variable flow system that circulates cold / hot water from a heat source side and a load side to air-condition a building, and a load side device and load side cold / hot water for processing an air conditioning load. Conveying device, heat source side device for supplying cold / hot water to the load side device and load side cold / hot water conveying device and heat source side cold / hot water conveying device, and heat storage tank and heat source water conveying device for supplying heat source water to the heat source side device By variably controlling the heat source side cold / hot water transfer device so that the flow rate of the bypass pipe and the bypass pipe connecting the cold / hot water sending side pipe line and the cold / hot water return side pipe line become a predetermined value, And a variable flow rate control device that circulates and supplies heat source water according to an air conditioning load, and a primary / secondary pump type heat source variable flow rate system. 6. A primary / secondary pump type heat source variable flow system for circulating and supplying cold / hot water from a heat source side and a load side, the load side device and load side cold / hot water for processing an air conditioning load. Conveying device, heat source side device for supplying cold / hot water to the load side device and load side cold / hot water conveying device and heat source side cold / hot water conveying device, and heat storage tank and heat source water conveying device for supplying heat source water to the heat source side device And a bypass pipe connecting the hot and cold water supply side pipeline and the cold and hot water return side pipeline, and a variable flow rate control device for performing variable control so that cold and hot water and heat source water are circulated and supplied according to the air conditioning load. The variable flow rate control device calculates and outputs the control output of the heat source side cold / hot water carrier so that the bypass pipe flow rate becomes a predetermined value when the load side cold / hot water return water temperature is within the set range, and the load side Cold water return water temperature is the above A primary / secondary pump type heat source variable flow system characterized by calculating and outputting a control output of a heat source-side cold / hot water transporting device so as to reduce the heat source-side cold / hot water transporting amount when it deviates from a set range. 7. The primary / secondary pump system according to claim 5, wherein the control output of the heat source water transport device is calculated based on the control output of the heat source side cold / hot water transport device. Heat source variable flow system.